Stoker construction



July 31, 1934. R. L. BEERS 1,968,277

STOKER CONSTRUCTION Filed July 30, 1952 2 Sheets-Sheet l wuenwbom .QOyCe L. Beers July 31,1934. R. L. BEERS' STOKER CONSTRUCTION Filed July so. 1932 2 Sheets-Sheet 2 v Qoyce LQ 52ers UNITED STATES Patented July 31, 1934- Tsn'r oFFics STOKER CONSTRUCTION Royce lL. Beers, Detroit, Mich, assignor to Detroit Stoker Company, Detroit, Mich., a corporation of Michigan Application July 36, l

10 Claims.

This invention relates generally to stokcrs and refers more particularly to a wind box and tuyere structure for underfeed stokers of the multiple retort type.

In the accompanying drawings: 7

Figure l is a perspective view of a stoker construction embodying my invention;

. Figure 2 is a fragmentary vertical sectional viewthrough the stoker construction illustrated in Figure 1; I

. Figure 3 is a detail elevation of one of the wind Figure 4 is an end elevation of the construction r illustrated in Figure 3;

Figure5 is a top plan view of the structure illustrated in Figure 3;

.Figure 6 is a rear elevation of one of the end tuyereblocks;

Figure 7 is aside elevation of the block illustrated in Figure 6; I V

Figure 8 is a rear elevation of one of the intermediate tuyere blocks;

Figure 9 is a side elevation of the block illustrated in Figure 8.

Referring now to the drawings, A is the front wall of a furnace, and B are a plurality of retorts extending through andrearwardly from-said wall. C are wind boxes set in the front wall A and bridging the retorts; D and E respectively are tuyre blocks arranged in rows between the retorts B from the boxes C to the rear ends of the retorts. As shown, the retorts B are substantially trough-shape in configuration and are arranged in substantially parallel formation above a suitable wind chamber G. The tuyere blocks F are hollow and are adapted to receive air from. the wind chamber G. Such blocks are provided with 4 outlets 1 for the air and collectively form ducts for the air from the chamber G to the wind boxes C in the front wall A. Preferably each box C is a hollow casting and is inverted U-shape in configuration. The legs 2 and 3 respectively of the q, boxes rest upon and are secured to the longitudi- 'nal edges of the retorts B. The arched portion 4 and the front, top and endwalls 5, 6, 7 and 8 respectively of eachbox are imperforate butthe rear wall ,9 is provided above and upon opposite sides of the arched portion 4 with connecting 5 openings 10, 11 and 12 respectively. Preferably the opening extends from one end wall to the other but isspaced from the top wall 6 and arched portion 4 so that relatively narrow wall portions 13 and 14 respectivelyare provided. As shown in Figure 4, the rear wall 9 from the uppermost edge of the arched portion 4 to the lower ends of the legs 2 and 3 is offset rearwardly relative to the portions 13 and 1 4 and end walls 7 and 8. Thus ledges 15, 16 and 17 respectively are provided in rear of the portion 14 and at the lower ends of the tuyere blocks'within the boxes C; and F are 332, Serial No. 627,073

legs and Ledges 18 and 19 respectively are also provided upon the front walls 5 of the boxes adjacent the lower ends of the legs 2 and 3.

The tuyere blocks D are located in the legs 2 and 3 at opposite ends ofthe boxes while the tuyere blocks E are located between the blocks D and above the arches 4. Preferably each block D has a substantially flatv body portion 20 and a web portion 21. As shown, the bodyportions 20 rest against the rear faces of the uppermost portions 13 of the rear walls and against the rear edges of the end walls '7 and 8 and abut thelupright edges 22 and 23 respectively of the offset portions of the rear wallsfwhile the web portions 21 rest upon the ledges 18 and 19 respectively and have substantially U-shaped recesses 24 in their upper ends receiving the portions 13 of the rear walls 9. Likewise each block E has a substantially flat'body portion 25 and a web portion 26, however, these blocks are much shorter than the blocks D. As shown, the body portions 25 of the blocks E rest on the ledges and against the rear faces of the uppermost portions 13 of the rear. walls, while the web portions 26 are providedin their upper and lower ends with substantially. U -shaped recesses.27 and 23 respectively that receive the portions 13 and14 of the rear walls. Preferably the construction and arrangement of the blocks D and E and rear walls 9 of the boxes are such that the faces 30, 31 and 32 respectively of the blocks D and E and offset portions of the rear walls 9 are substantially flush with the rear face 33 of the furnace wall A. Moreover, the construction and arrangement of theblocks Dand the leg portions 2 and 3 of the boxes are suchthat the portions L and M respectively of the openings 11 and 12 below the ledges 18 and 19 are uncovered; and receive air from the tuyere blocks F.- To permit this air to flow rearwardly from the boxes- C-into the furnace above the retorts the upright edges of thebody portions and respectively of the bloclgs have segmental openings 34 and 35,

preferably semi-circular in form,.disposed in opi posed relation and forming circular openings for the passage of the air. Thus the air discharged therefrom supports combustion of any gases given.

off by the fuel upon its initialintroduction into the retorts within the furnace. In practice the wind boxes C may be readily mounted upon'the retorts B and may, if desired, be bolted thereto, suitable openings 40 and 41 respectively being provided in and 3 for this purpose. As a result the boxes C are individually mounted and any one of them may be removed for repairs disturbing the others. Likewise the blocks Dand E may be readily assembled withinor removed;

from the boxes C. For instance, one of the blocks D may be inserted into the opening 12 by first engaging the recess 24 with the wall portion 13 the lower ends of the leg portions 2 or replacements without and then swinging the lower end of said block into the box so that said lower end will seat upon the ledge 19. The blocks E may then be inserted one at a time in the opening 11 so that the recesses 27 and 28 will receive the wall portions 13 and 14 whereupon such blocks may be moved sidewise on the wall portions 13 and 14 toward the block D in the opening 12. The other end block D may then be engaged with the wall portion 13 and inserted in the opening 11 to complete the assembly. Thus the construction and arrangement is such that the intermediate blocks E are held in place by the end blocks D but may be removed upon the removal of any one of the end blocks D from the said box C. This provides a sectional and removable tuyere blockv assembly wherein the parts exposed to the fire may be individually removed and replaced. Moreover, the manner in which the blocks are held in place is such that the assembly or removal of the blocks may be easily and quickly made.

What I claim as my invention is:

1. In a stoker, a hollow wind box having a rear wall provided with a longitudinally extending slideway for tuyere blocks and provided below and at opposite ends of said slideway with openings through which the tuyre blocks aforesaid may be moved and into which other tuyere blocks may be received.

In a stoker, a hollow wind box having a rear wall provided with a longitudinally extending slideway for tuyere blocks, a ledge below said slideway for supporting portions of said tuyere blocks, and an opening at one end of the slideway through which said tuyere blocks may be moved to and from the slideway and into which another tuyre block may be received, said wind box having a front wall provided with means for supporting the last mentioned tuyre block.

3. In a stoker, a hollow wind box having a rear wall provided with a longitudinally extending slideway for tuyere blocks of one design, and an opening at one end of the slideway' through which said tuyere blocks may be moved to and from the slideway and into which a tuyere block of another design may be received.

4. In a stoker, a hollow wind box having a rear wall provided with a longitudinally extending opening for tuyere blocks, vertically extending openings for tuyere blocks at opposite ends of said longitudinally extending opening, and an offset portion between said vertical openingsproviding a ledge below the longitudinally extending opening for supporting portions of the tuyere bloc-ks in the longitudinally extendingopening and upright portions for engagement by the tuyere' blocks in the vertical openings.

5. In a furnace, the combination with a plurality of spaced elongated retorts, and tuyere sections spanning the spaces therebetween and forming therebeneath air chambers, of a wind box tuyere structure spanning the retorts at their charging ends and defining the charging openings thereto, comprising a plurality of hollow boxes, each having top, end, front and rear walls, and an arched bottom wall defining with said end walls legs which support the boxes on the retort side walls, and which communicate with the air spaces therebetween, each rear wall com prising a plate provided with an approximately inverted U-shaped opening, the opposed edges of which are substantially parallel, a plurality of tuyere blocks slidably mounted intermediate the leg portions of each U-shaped opening, and an end tuyere block removably mounted in each leg portion and holding said intermediate blocks against sliding movement, said boxesbeing mounted with their end walls in abutting relationship with each other.

6. In a stoker, a hollow wind box having top, end, front and rear walls and an arched bottom wall defining with said end walls supporting legs, said rear wall comprising a plate provided with an approximately inverted U-shaped opening, the opposed edges of which are substantially parallel, a plurality of tuyere blocks slidably mounted intermediate the leg portions of the U-shaped opening, and an end tuyere block removably mounted in each leg portion and holding said intermediate blocks against sliding movement. I

7. In a stoker, the combination with aplu rality of laterally spaced elongated retorts, and longitudinally extending air ducts between said retorts,of means for conducting air from the ducts to points above the retorts, including wind boxes extending upwardly from the retorts at the forward ends of the ducts, and having openings in their rear walls communicating with and adapted to receive air from the forward ends of said ducts, the rear walls of said wind boxes comprising plates having approximately inverted U-shaped openings, and removable tuyre blocks within said openings and forming portions of the rear walls of said wind boxes, said tuyere blocks being provided above said duets with means for directing rearwardly over the retorts the air received in the first mentioned openings.

8. In a furnace, the combination with a plurality of laterally spaced retorts and tuyere sections spanning the spaces therebetween and forming therebeneath air chambers, of a wind box tuyre structure spanning the retorts at their charging ends and defining charging openings thereto, comprising a plurality of hollow boxes, each having top, end, front and rear walls, and an arched bottom wall defining with said end: walls supporting legs which rest on the. retort side walls and which communicate with the air spaces therebetween, the rear walls of said boxes having openings therein, and tuyere blocks arranged in said openings and having openings through which air from the interior of saidboxes may be discharged rearwardly over said retorts.

9. In a stoker, a hollow wind box having top, bottom, end, front and rear walls, a portion. of the bottom wall being arched and defining with the end, front and rear walls supporting legs, said rear wall having an opening therein, opposite ends of which are adjacent the end walls, end tuyere blocks removably mounted in said opening at opposite sides of the arched portionaforesaid, and a plurality of tuyere blocks ar-. ranged side by side in the opening over the arched portion between and held against displacement by the end blocks just mentioned.

10-. In a stoker, a hollow wind box having top, bottom, end, front and rear. walls, said rear wall having an approximately inverted U-shaped opening therein, the opposed edges of. which are substantially parallel, a plurality of tuyere blocks mounted in the opening intermediate the leg portions of the U, and an end tuyre block re-. movably mounted in each leg portion ofthe U and holding said intermediate blocks against di pl cement.

ROYCE L. BEERS. 

